Assessment of crop loss due to insect pests in Indian mustard in Semi-arid region of Rajasthan

The present investigation on ‘Assessment of crop loss due to insect-pests in Indian mustard in Semi-arid region of Rajasthan’ was conducted at S.K.N. college of Agriculture, Jobner (Rajasthan) during Rabi, 2016-17 and 2017-18. It was observed that the infestation of aphid, L. erysimi (Kalt.) commenced in the first week of January in both the years. An avoidable loss of 41.14 % was registered due to insect pests of Indian mustard in two consecutive years of study.